Product Description The Timney AR Calvin Elite is a premium drop-in trigger upgrade designed to improve feel and precision in AR-15/AR/M4 platforms. Factory tuned for a crisp, zero-creep single-stage break, it delivers a clean 1.5 lb pull while using an ultra-reliable 5 lb hammer spring for consistent ignition. Interchangeable red trigger shoes and an adjustable shoe system help tailor length of pull, cast, and height for a custom fit and positive contact, all without the need for gunsmithing. Product Highlights Single-stage, drop-in AR trigger module engineered for a crisp, creep-free break Light 1.5 lb pull weight paired with an ultra-reliable 5 lb hammer spring Adjustable/interchangeable trigger shoe system for personalized fit and trigger control Installs using standard AR hammer/trigger pins for an easy upgrade (no gunsmith required) Designed to enhance practical accuracy and consistency versus typical factory triggers Specs Brand: Timney Triggers Product Line/Model: AR Calvin Elite Trigger Type: Single Stage Pull Weight: 1.5 lb Hammer Spring: 5 lb Compatibility: AR-15 / AR/M4 (Mil-Spec built lowers) Pin Size: Small (.154") Color/Finish Details: Red trigger shoe(s) Country of Origin: United States of America UPC: 081950660087 Manufacturer Part Number: 660CE Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.